Core Java Software Engineer - TS/SCI with Polygraph

Req ID: RQ228567 Type of Requisition: Regular Clearance Level Must Be Able to Obtain: None Public Trust/Other Required: None Job Family: Software Engineering Skills: Apache Tomcat,Java Database Connectivity (JDBC),Java Web Development Experience: 10 + years of related experience US Citizenship Required: Yes Job Description: Seize your opportunity to make a personal impact as a Core Java Software Engineer supporting an information technology enterprise. At GDIT, people are our differentiator. As a Core Java Software Engineer, you will help ensure today is safe and tomorrow is smarter. Our work depends on a Core Java Software Engineer joining our team. Expert-level knowledge of Core Java (NOT Spring Boot), Eclipse IDE v2026, Java 17 or later, JVM, JRE, and JDK concepts, JavaScript, AJAX, jQuery, JSP, Apache Tomcat 11 or later, Tomcat connector, MariaDB (MySQL) v10 or latest, HTML5, CSS, JSON/XML REST API, SSH, PKI, OpenSSL, Putty, Linux and LDAP. Extensive experience with LDAP authentication and authorization, and custom LDAP-based solutions. Strong experience with SSH and Putty, and custom SSH-based tools and applications on Linux platform. Experience with Linux system administration and command-line tools. Experience w/ Java REST API development, and API secure requests using application certificates and scalability for user activity monitoring. Experienced w/ JDBC, DAO pattern and configuration using MariaDB (MySQL) and custom database tools and scripts – connection pooling without framework. Experience deploying applications on Apache Tomcat, configuring Tomcat connectors, and managing (Apache Server). Experience w/ front-end development w/ JSP, AJAX, jQuery, JavaScript, HTML and CSS design for web presence and back-end development; Experienced writing Jakarta Servlet API, including servlet lifecycle, request and response handling, and session management. Experience w/ Java Base64 API, that encodes and decodes data, including its usage and limitations. Knowledge of Java Cryptography Architecture (JCA) and its APIs. Knowledge of encryption algorithms, such as AES, RSA and ECC and their usage in Java. Experience w/Quartz Job Scheduling Library using Core Java development. Experience w/ software version control tools (Git/GitHub) code repository; Knowledge of PKI infrastructure and secure data transmission, and custom PKI-based tools and applications. Knowledge of X.509 certificate handling, including certificate parsing, certificate validation and certificate chaining. Experienced in generating, managing, and storing key pairs using OpenSSL, and RSA, troubleshooting PKI-related issues, including key pair and certificate problems. Strong problem-solving skills and analytical thinking, attention to detail, and excellent communication and collaboration skills with technical and non-technical stakeholders. Ability to analyze user needs to determine technical requirements. Ability to write clean, maintainable, and well-documented code. Shows initiative and offers ideas for new products and improvements to existing interfaces. Actively keeps apprised of industry technological enhancements and changes. Location: Chantilly, VA (On Customer Site) Desired skills: Some experience integrating Python into web applications; Some experience Writing Confluence plugins Familiar w/ Windows Active Directory Certificate Services (AD CS) – for issuing and managing key infrastructure (PKI) certificates US Citizenship Required

WHAT YOU’LL NEED TO SUCCEED:

GDIT IS YOUR PLACE:

401K with company match Comprehensive health and wellness packages Internal mobility team dedicated to helping you own your career Professional growth opportunities including paid education and certifications Cutting-edge technology you can learn from Rest and recharge with paid vacation and holidays

• WeAreGDIT
• JET
• GDITEnhanced2026
• VA_2026Alumni

The likely salary range for this position is $158,855 - $214,921. This is not, however, a guarantee of compensation or salary. Rather, salary will be set based on experience, geographic location and possibly contractual requirements and could fall outside of this range. Total Rewards at GDIT: Our benefits package for all US-based employees includes a variety of medical plan options, some with Health Savings Accounts, dental plan options, a vision plan, and a 401(k) plan offering the ability to contribute both pre and post-tax dollars up to the IRS annual limits and receive a company match. To encourage work/life balance, GDIT offers employees full flex work weeks where possible and a variety of paid time off plans, including vacation, sick and personal time, holidays, paid parental, military, bereavement and jury duty leave. To ensure our employees are able to protect their income, other offerings such as short and long-term disability benefits, life, accidental death and dismemberment, personal accident, critical illness and business travel and accident insurance are provided or available. We regularly review our Total Rewards package to ensure our offerings are competitive and reflect what our employees have told us they value most. Our Identity Verification Process: As part of the hiring process, we will ask you to complete an identity verification process that leverages advanced biometrics and artificial intelligence to ensure authenticity and protect against identity fraud. You are expected to be on camera during virtual interviews. We reserve the right to take your picture to verify your identity and prevent fraud. By proceeding, you authorize the collection, processing, and use of your biometric data for identity verification and security purposes. About Our Work: We are GDIT. A global technology and professional services company that delivers technology solutions and mission services to every major agency across the U.S. government, defense and intelligence community. Our 26,000 experts extract the power of technology to create immediate value and deliver solutions at the edge of innovation. We operate across 50+ countries worldwide, offering leading mission-ready capabilities in AI, cloud, cyber and software development. Join our Talent Community to stay up to date on our career opportunities and events at Equal Opportunity Employer / Individuals with Disabilities / Protected Veterans General Dynamics Information Technology